From PostGIS in Action, Third Edition by Leo S. Hsu and Regina O. Obe

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PostGIS in Action, Third Edition teaches readers of all levels to write spatial queries for PostgreSQL. It first gives you a background in vector-, raster-, and topology-based GIS and then quickly moves into analyzing, viewing, and mapping data. This fully updated third edition covers key changes in PostGIS 3.0 and PostgreSQL 12, including parallelization support, partitioned tables, and new JSON functions that help in creating web mapping applications.